-98.79% is the change from 331 to 4
Calculation steps:
[( 4 - 331 ) ÷ 331] x 100 = -98.79%
Formula
Percentage change = [(4 - 331) / 331] x 100
Subtract the new number by the original number
4 - 331 = -327
-327 ÷ 331 = -0.9879154078549849
-0.9879154078549849 x 100 = -98.79%